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Evgen [1.6K]
3 years ago
5

Help please, I don’t understand this

Mathematics
2 answers:
Solnce55 [7]3 years ago
6 0

Answer:

r(14) = 29

Step-by-step explanation:

r(x) = 3/2x+8

r(14) = 3/2*14+8 = 21+8 = 29

kotegsom [21]3 years ago
4 0

Answer:

r(14) would be equal to 29.

Step-by-step explanation:

you plug in 14 for x in the equation, which makes 3/2(14)+8. it simplifies to 29. hope that helped

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Mumz [18]
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3 years ago
Maya sells candles to her 5 neighbors. Each neighbor buys 2 boxes of candles. There are 6 candles in each box. What is the total
DedPeter [7]

Answer:

Each neighbor will get 12 candles so in total, 60 candles will be sold.

Step-by-step explanation:

7 0
3 years ago
Use the formula to find the standard error of the distribution of differences in sample means, x¯1-x¯2. Samples of size 100 from
garri49 [273]

Answer:

standard error = 2.11

Step-by-step explanation:

First we stablish the data that we have for each sample:

<u>Population 1</u>                                          <u>Population </u>2

n₁ = 100                                                     n₂ = 90

x¯1= 95                                                    x¯2 = 75

σ₁ = 14                                                        σ₂ = 15                  

To calculate the standard error of each sample we would use the formulas:

σ = σ₁/√n₁

σx¯2 =  σ₂/√n₂

Now, in order to obtain the standard error of the differences between the two sample means we combine those two formulas to obtain this:

σx¯1 - σ x¯2  = √(σ₁²/n₁ + σ₂²/n₂ )

So as you can see, we used the square root to simplify and now we require the variance of each sample (σ²):

σ₁² = (14)² = 196

σ₂² = (15)² = 225

Now we can proceed to calculate the standard error of the distribution of differences in sample means:

σx¯1 - σx¯2  = √(196/100 + 225/90) =  2.11

This gives an estimate about how far is the difference between the sample means from the actual difference between the populations means.

6 0
3 years ago
KL = 8x-5 and LM = 6x+3
Burka [1]
The answer is x=4. 
set the equations up: 8x-5=6x-3
Subtract 6x from one side and then the other side 2x-5=3 
Add 5 from one side and then the other 2x=8
Divide 2 on each side which gets you x=4
4 0
3 years ago
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xxMikexx [17]
10 pounds you divide your weight by 6
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